Nobody talks about the edge of the mesh — until the edge causes a problem. An expanded nickel mesh sheet is manufactured as a continuous diamond network. When you cut that network to cell-frame dimensions, you sever the strands at the periphery. The cut edge is now a line of exposed strand ends — each one a potential failure point if it is sharp enough to cut the adjacent gasket, long enough to bridge to the next cell frame, or contaminated enough to initiate a localized corrosion cell. At Jiangsu DZX Alloy Co., Ltd., edge treatment is not an afterthought — it is a documented manufacturing step with defined acceptance criteria. We cut, chamfer, and verify the edge condition on every sheet before packaging, and we provide your incoming QC team with an inspection protocol so that you can confirm edge quality at receiving — before the sheet enters your cleanroom, before it contacts your membrane, and before it becomes a root cause in your stack failure analysis.

Your Incoming QC Protocol — What to Check When the Mesh Arrives

We provide this checklist as a starting point for your receiving inspection procedure. It is designed to be completed in under 15 minutes per crate by a trained QC technician — catching the few defect types that can survive our internal inspection without creating an inspection bottleneck at your receiving dock.

Total inspection time: approximately 15 minutes per crate. If any sheet fails an inspection checkpoint, the entire crate is quarantined pending root cause investigation. We recommend retaining 2 sheets per lot as unprocessed reference samples — stored in desiccated packaging — for comparative analysis if field performance issues arise later.

Key Features & Benefits

• Edge treatment is a documented process, not an operator's judgment call — Many mesh suppliers rely on the cutting operator's experience to determine whether an edge is "good enough." At DZX, edge treatment has defined process parameters (cutting method, chamfer radius, cleaning protocol) and defined acceptance criteria (dimensional tolerance, tactile pass/fail, water break test). Every sheet is verified against the criteria. The process is documented so that your quality audit can trace the edge treatment of any sheet back to the specific operator, machine, and shift.

• The edge QC checklist you need — before you knew you needed it — Most electrolyzer OEMs develop their incoming QC protocol after experiencing a field failure traced to a mesh edge defect. We provide the checklist upfront, with your first trial shipment. It catches edge defects at receiving — not after stack assembly, not during commissioning, and not after the stack has been operating for 6 months and the failure analysis requires a $50,000 teardown.

• Nickel-compatible edge tooling — no iron contamination from the cutting process — Standard shearing blades are high-carbon tool steel. When they cut nickel mesh, microscopic iron particles transfer to the cut edge. Those particles dissolve in the KOH electrolyte. The iron plates onto the cathode. The cathode overpotential increases. Our cutting tooling and abrasive chamfer media are nickel-compatible — no iron is introduced at the edge during processing.

• Manifold holes punched and deburred from the gasket side — A punched hole has a burr on one side and a smooth edge on the other — this is inherent to the punching process. We punch from the non-gasket side so that the burr faces away from the gasket. Then we deburr the gasket side to ensure the surface contacting the gasket is smooth. The result: a manifold hole that seals reliably — no slow weeping electrolyte leaks around the manifold port.

• Laser cutting available for complex sheet geometries — For cells with non-rectangular active areas, multiple manifold ports, or alignment features (notches, tabs, registration holes), laser cutting provides the geometric flexibility that shear cutting cannot. Laser kerf width is controlled to minimize the heat-affected zone — the microstructural change at the cut edge is limited to approximately 0.05 mm for our optimized nickel laser cutting parameters.

• Every sheet traceable — including edge treatment data — Your MTC includes the ingot chemistry. Your dimensional report includes sheet measurements. Your edge inspection sign-off confirms that the sheet perimeter met the tactile, visual, and dimensional criteria. If a field failure is traced to an edge defect — and the investigation requires identifying exactly which sheets were in that specific stack — the traceability data exists.

About DZX — Two Decades of Nickel Process Control

Jiangsu DZX Alloy Co., Ltd. has manufactured pure nickel products since 2002. Over two decades, we have learned that the difference between a mesh sheet that performs flawlessly for 60,000 hours and one that causes a stack failure is rarely the bulk material. It is the details at the boundary: the edge that was sharp enough to cut a gasket. The strand that was bent enough to bridge a cell frame. The manifold hole that had a burr facing the wrong direction.

These are manufacturing process control issues — not material science issues. They are solved by defining the process, training the operators, verifying every sheet, and documenting everything. This is what two decades of nickel process control looks like in practice.

• 12,000 m² nickel-only facility — melting, rolling, expanding, cutting, edge treatment, annealing, cleaning, inspection, and packaging. No cross-material contamination from tooling or processing equipment.

• Documented edge treatment process with defined parameters and acceptance criteria. Tactile sweep on every sheet. Traceable to operator and shift.

• ISO9001 with full melt-to-edge traceability. SGS-accredited. Incoming QC protocol provided with first shipment.

Chemistry certified from ingot through finished mesh — including the edges.

Third-party verification by SGS, BV, or TÜV. Free 5-sheet sample with complete documentation package and incoming QC checklist for your receiving inspection team.

Frequently Asked Questions

The incoming QC checklist we provide is your evaluation tool. Apply it to a sample from your current supplier and a sample from DZX. Compare the results: how many sheets have tactile-detectable edge sharpness? How many have dimensional oversize? How many have visible burrs at manifold holes? The comparison is objective and the pass/fail criteria are the same for both suppliers. If your current supplier passes every checkpoint on every sheet — keep buying from them. The checklist is your data, not our sales claim.

Laser cutting can produce any 2D sheet perimeter geometry — curved edges, notches, alignment tabs, registration features — within the cutting bed dimensions. We need your DXF or DWG file of the sheet outline plus manifold hole locations. The edge treatment process (chamfer, tactile sweep, water break test) applies to laser-cut edges with the same acceptance criteria as straight-cut edges.

Laser cutting creates a heat-affected zone (HAZ) at the cut edge — typically 0.03–0.05 mm deep for our optimized nickel cutting parameters. Within this zone, the microstructure is slightly different from the bulk. For most electrolyzer applications, this HAZ is acceptable because the edge is outside the electrode active area. If your cell design places the active area within 1 mm of the sheet edge — and the edge HAZ is a concern — we recommend shear cutting, which creates no HAZ. We can provide micrographs of laser-cut vs shear-cut edges for your materials engineering team to evaluate.

Yes. The QC checklist is designed to be self-explanatory — a technician with basic inspection training can follow it. For new electrolyzer manufacturing teams, we can provide a video walkthrough of each checklist step showing the correct inspection technique, common defect examples, and pass/fail examples. We can also join a video call with your QC team during their first receiving inspection to answer questions in real time.

Take a photograph showing the defect in context (which sheet, which edge location, what the defect looks like at the inspection magnification specified in the checklist). Send it to us with the crate number and sheet number. We will trace the sheet back to our inspection record — operator, shift, machine, and pass/fail sign-off. If our process missed the defect, we implement corrective action. If the defect occurred in transit, we investigate packaging adequacy. In either case, we replace the sheet at no charge. The inspection data exists precisely so that root cause can be identified — not so that blame can be assigned.